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Recent Studies from Hong Kong Polytechnic University Add New Data to Ceramics (Highly enhanced sinterability of fine-grained Ba0.6Sr0.4TiO3-MgO bulk...

July 8, 2014



Recent Studies from Hong Kong Polytechnic University Add New Data to Ceramics (Highly enhanced sinterability of fine-grained Ba0.6Sr0.4TiO3-MgO bulk ceramics and in-situ nanocomposite thick films)

By a News Reporter-Staff News Editor at Journal of Technology -- Investigators discuss new findings in Ceramics. According to news reporting from Hong Kong, People's Republic of China, by VerticalNews journalists, research stated, "Well-developed, dense and fine-grained MgO-(Ba0.6Sr0.4)TiO3 with 40 wt% MgO content (denoted as BST-MgO) bulk ceramics were fabricated by high-energy ball mechanochemical technique using a hybrid processing. Based on this technique, the fabrication temperature was as low as 1200 degrees C i.e., 200 degrees C lower than that required by using conventional solid-state process."

The news correspondents obtained a quote from the research from Hong Kong Polytechnic University, "At the same time, dense, homogeneous and crack-free ceramic ceramic 0-3 nanocomposite BST MgO thick film was obtained at 700 degrees C using the spin-coating method. At 10 kHz and room temperature, the BST MgO bulk ceramics exhibited a moderate dielectric constant of about 500 and low loss tangent of less than 0.005; while for the nanocomposite thick films, the dielectric constant and loss tangent were about 140 and less than 0.03 (at 100 kHz) respectively. In addition, both the bulk ceramics and thick film show a broad and diffused phase transition."

According to the news reporters, the research concluded: "The dielectric room-temperature tunabilities measured at 100 kHz were found to be 4% at 1.5 kV/mm for the bulk ceramic, and 17% at 10 kV/mm for nanocomposite thick film."

For more information on this research see: Highly enhanced sinterability of fine-grained Ba0.6Sr0.4TiO3-MgO bulk ceramics and in-situ nanocomposite thick films. Ceramics International, 2014;40(7):10475-10481. Ceramics International can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Ceramics International - www.elsevier.com/wps/product/cws_home/405926)

Our news journalists report that additional information may be obtained by contacting H.F. Zhang, Hong Kong Polytechnic University, Dept. of Appl Phys, Kowloon, Hong Kong, People's Republic of China. Additional authors for this research include L.B. Kong, C.L. Mak, K.W. Kwok, Y. Wang and H.L.W. Chan.

Keywords for this news article include: Asia, Ceramics, Hong Kong, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Journal of Technology


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